Variable-reluctance position sensor
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United States of America Patent
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Mar 15, 2011
Grant Date -
Jun 15, 2006
app pub date -
Oct 7, 2003
filing date -
Oct 7, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A variable reluctance analog position device designed to determine the position variation of a target made from a ferromagnetic material. The device includes at least one magnet, the target and the magnet defining a gap therebetween. A magnetosensitive element detects induction variation produced in the gap by relative movement of the target relative to the magnet. The magnet is magnetized in a direction essentially perpendicular to the front surface of the magnet, which defines one edge of the gap. The magnet includes a cavity open at the front surface thereof and the magnetosensitive element is housed in the cavity. Moreover, the target is provided with a specific geometric configuration determined such that the induction variation according to the position of the target corresponds to a pre-defined function.
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